<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="消息提示的文案" type="info" center show-icon :closable="false"> </el-alert>
      <el-steps :space="200" :active="activeIndex - 0" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" ref="addFormRef" label-width="100px" label-position="top" :rules="addFormRules">
        <!-- tab 侧边栏 -->
        <el-tabs :tab-position="'left'" :before-leave="beforeLeaveTab" @tab-click="tabClicked" v-model="activeIndex">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"> </el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" v-model="addForm.goods_price"> </el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"> </el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"> </el-input>
            </el-form-item>
            <!-- 级联选择 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item v-for="item in manyData" :key="item.attr_id" :label="item.attr_name">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, index) in item.attr_vals" :key="index" :label="cb" border> </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="upLoadPath"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :file-list="addForm.pics"
              :headers="headerObj"
              :on-success="handleSuccess"
              list-type="picture"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片 -->
    <el-dialog title="预览图片" :visible.sync="previewVisible" width="60%">
      <img class="previewPhoto" :src="previewPath" alt="" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: 0,
      // 提交表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 级联选择器选中的数组
        goods_cat: [],
        // 上传图片的数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        // 商品参数数组
        attrs: []
      },
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      },
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      //   三级id
      cat_id: 0,
      // 动态参数数组
      manyData: [],
      // 静态属性数组
      onlyData: [],
      upLoadPath: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片的路径
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取数据失败!')
      this.cateList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      this.cat_id = this.addForm.goods_cat[2]
    },
    beforeLeaveTab(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择三级商品分类!')
        return false
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cat_id}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error('获取动态参数失败!')
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cat_id}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error('获取静态属性失败!')
        this.onlyData = res.data
      }
    },
    // 预览图片
    handlePreview(filePath) {
      this.previewPath = filePath.response.data.url
      this.previewVisible = true
    },
    // 移除图片的处理函数
    handleRemove(removeInfo) {
      const filePath = removeInfo.pic
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 图片上传成功
    handleSuccess(successInfo) {
      const picPath = { pic: successInfo.data.tmp_path }
      this.addForm.pics.push(picPath)
    },
    addGoods() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this.$message.error('请填写必要的表单项!')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyData.forEach((item) => {
          const newInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败!')
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox.is-bordered {
  margin: 0;
}
.el-checkbox.is-bordered + .el-checkbox.is-bordered {
  margin: 10px;
}
.previewPhoto {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
.quill-editor {
  height: 200px;
  margin-bottom: 60px;
}
</style>
